Makes us wonder how these cyclists don't fall short of breath as they pedal to the finish line. Here's a glimpse of the tricky but beautiful terrain that outlines the Tour de France...
Urge them to end 'avalanche of plastic'
Mark Cavendish has pulled out of the Tour de France before the 15th stage to Prato Nevoso, his Team Columbia said.
The World No 1 sustained the pace in the climbs up to the Col de Vars and the Col d'Izoard, both culminating at more than 2,000 metres, but then lost ground when his compatriot Thibaut Pinot accelerated to rein in defending champion Geraint Thomas.
Team Ineos's Luke Rowe and Lotto Jumbo-Visma's Tony Martin were both kicked out of the race following an altercation, just under 14 kilometres from the finish.
Alberto Contador showed he was prepared to risk everything to win the Tour de France on Tuesday, crashing on the final descent as he tried to attack overall leader Chris Froome.